<template>
    <el-header>
        <!-- 右侧导航栏折叠按钮 -->
        <span class="btn-collapse" @click="collapseChage" :title="collapse ? '展开侧边栏' : '收起侧边栏'">
            <i class="el-icon-menu"></i>
        </span>
        <!-- 系统标题 -->
        <h3 class="header-title margin-l-10">小区后台管理系统</h3>
        <div class="header-right">
            <!-- 消息中心 -->
            <!-- <div class="btn-info">
        <el-tooltip placement="bottom">
          <span slot="content">{{message ? `有${message}条消息` : '消息中心'}}</span>
          <router-link to="/info">
            <i class="el-icon-bell"></i>
          </router-link>
        </el-tooltip>
        <span class="btn-info-tip" v-if="message"></span>
      </div> -->
            <!-- 用户头像 -->
            <!-- <img class="header-portrait" src="static/portrait.jpg" alt="用户头像"> -->
            <!-- 用户名下拉菜单 -->
            <el-dropdown @command="handleCommand">
                <span class="el-dropdown-link">
                    {{username}}
                    <i class="el-icon-caret-bottom"></i>
                </span>
                <el-dropdown-menu slot="dropdown">
                    <el-dropdown-item divided command="loginout">退出登录</el-dropdown-item>
                </el-dropdown-menu>
            </el-dropdown>
        </div>
    </el-header>
</template>

<script>
import Bus from "./bus";
export default {
    name: "Header",
    data() {
        return {
            message: 1,
            username: localStorage.getItem("username"),
            collapse: false,
        };
    },
    methods: {
        // 侧边栏折叠打开效果
        collapseChage() {
            this.collapse = !this.collapse;
            Bus.$emit("collapse", this.collapse);
        },

        // 用户名下拉菜单选择事件
        handleCommand(command) {
            if ("loginout" == command) {
                localStorage.clear();
                this.$router.push("/login");
            }
        },
    },
};
</script>

<style scoped lang="less">
[class*="el-icon"] {
    cursor: pointer;
}
.el-header {
    width: 100%;
    padding: 0 30px;
    background-color: @headerBgColor;
    color: white;
    font-size: 16px;
    line-height: 53px;
}
.header-title,
.btn-info {
    display: inline-block;
}
.header-title,
.btn-collapse,
.el-icon-bell {
    font-size: 25px;
}
.header-right {
    float: right;
}
.btn-collapse {
    vertical-align: sub;
}
.btn-info {
    position: relative;
}
.btn-info-tip {
    position: absolute;
    top: 10px;
    .circle(8px);
    background-color: #ff464f;
}
.el-icon-bell {
    color: white;
    vertical-align: text-top;
}
.header-portrait {
    .circle(40px);
    margin: 0 20px;
    vertical-align: middle;
}
.el-dropdown-link {
    color: white;
    cursor: pointer;
}
</style>
